Cobblestones is a small channel break near Lakey Peak in East Sumbawa, offering both lefts and rights on a compact reef. The wave provides a fun option when the main breaks are too crowded or too big, with shorter rides and a more relaxed atmosphere. It's one of several satellite breaks in the Hu'u area that extends the surfable options beyond the famous Lakey Peak and Lakey Pipe.
Model forecast for swell, wind and tide.
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Water temp
28°C
Wetsuit
Boardshorts / Rashguard
Difficulty
5/10
Crowd level
4/10
Cobblestones is a reef break in East Sumbawa, Indonesia, with peaks that run both left and right.
Cobblestones picks up swell from the SSW round to the SW, and it's best when it's coming straight out of the SW. That's a tight window, so it needs the swell direction to line up. It starts working at around 0.9m and handles up to about 1.8m, with the sweet spot around 1.3 to 1.6m. Period matters too: aim for 14s or longer, as anything under 10s tends to be weak. These are the numbers our scoring uses, so treat them as a guide rather than a promise.
An E wind is dead offshore at Cobblestones, and anything from the ENE round to the ESE keeps it clean. The morning is typically the best window, roughly 6am to midday. Light winds from other directions can still be fine; strong offshores can make it hard to get into waves.
Cobblestones is at its best around mid tide, roughly 0.5m to 1.5m on the local chart.
The most reliable run of swell at Cobblestones comes Apr to Oct. There's a second window in Nov to Mar too. Best Apr-Oct (dry season, SE trades offshore). Swells year-round but wet season brings onshore winds.
The water at Cobblestones averages around 28°C, so boardshorts or a rashguard will do. It shifts a few degrees through the year, so check the season before you pack.
It's more of an intermediate wave, rated 5/10 for difficulty, so newer surfers are best off sticking to the smaller days. Expect a moderate crowd (4/10) when it's on. Things to watch for: sharp, shallow reef (booties help).
The nearest airport on our list is BMU, then it's roughly a 30-minute drive.
The closest breaks we track are Lakey Peak (0.4 km), Lakey Pipe (1.1 km) and Nungas (1.1 km), handy when Cobblestones isn't working. We track 4 spots around East Sumbawa in total.
Peak: Apr-Oct
Secondary: Nov, Dec, Jan, Feb, Mar
Best Apr-Oct (dry season, SE trades offshore). Swells year-round but wet season brings onshore winds.
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